Density of Ly-alpha emitters at z=4, with
SFR=1 Msolyr-1 is comparable to
phi*, however. Hierarchical cosmogonies (CDM) lead
us to expect low-mass systems to dominate at high z, so these objects
are far more representative of the early stages of galaxy formation
than the bright submm sources. DAZLE's detection
rate, in a small (dz=0.1) redshift slice,
in the low-SFR regime, should rival LMA's
with bright objects over a much larger (hence uncertain) redshift range.